68583556947361 has 9 divisors (see below), whose sum is σ = 68881108247539. Its totient is φ = 68287285605136.

The previous prime is 68583556947329. The next prime is 68583556947401. The reversal of 68583556947361 is 16374965538586.

The square root of 68583556947361 is 8281519.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 13927935960225 + 54655620987136 = 3732015^2 + 7392944^2 .

It is not a de Polignac number, because 68583556947361 - 2⁵ = 68583556947329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68583556147361) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1929576156 + ... + 1929611698.

Almost surely, 2^{68583556947361} is an apocalyptic number.

68583556947361 is the 8281519-th square number.

68583556947361 is the 4140760-th centered octagonal number.

It is an amenable number.

68583556947361 is a deficient number, since it is larger than the sum of its proper divisors (297551300178).

68583556947361 is an frugal number, since it uses more digits than its factorization.

68583556947361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71552 (or 35776 counting only the distinct ones).

The product of its digits is 3919104000, while the sum is 76.

The spelling of 68583556947361 in words is "sixty-eight trillion, five hundred eighty-three billion, five hundred fifty-six million, nine hundred forty-seven thousand, three hundred sixty-one".